Power take-off



June 15, 1943. E. J. KARP POWER TAKE-OFF Original Filed April 25, 1941 INVENTOR. E award/ J ff 011v,

BY flm, uw, few '47 a Patented June 15, 1943 UNITED STATES PATENT OFFICE POWER TAKE-OFF Edward J. Karp, Cicero, Ill., assignor to G. S. Blakeslee & 00., Cicero, 111., a corporation of Illinois 4 Claims.

This invention relates to power take-offs, and has to do with means for driving various attachments from a power take-01f shaft of a machine intended for use in restaurants, hotels and other establisrnnents in the mixing and treatment of comestibles.

My invention is directed to power take-off means of the character stated in which the parts may readily be assembled and disassembled for cleaning, replacement, or repair. More specifically, I provide a housing in which the means for transmitting power from the take-01f shaft to the attachment is mounted, this housing and the parts carried thereby constituting a unit readily removable as such from the machine, and in which the parts mounted in the housing may be removed therefrom and replaced therein with expedition and facility when the unit is removed from the machine. I further provide driving connections between the power take-off shaft and the parts carried by the removable and replaceable unit, such connections permitting removal and replacement of the unit without disturbing the take-off shaft, while assuring proper driving connection between the latter and'the unit when the latter is mounted in its proper position on the machine, such driving connections also accommodating any slight misalignment or inaccuracies between the take-off shaft and the parts driven thereby. Also, I provide improved clutch means carried by the unit for controlling drive of the attachment from the take-off shaft. Further objects and advantages of my invention will appear from the detail description.

In the drawing:

Figure 1 is a plan view of a mixing machine, with the cover thereof removed, provided with a power take-off embodying my invention;

Figure 2 is a sectional view, on an enlarged scale, taken substantially on line 22 of Figure 1, showing fragmentarily and in dotted lines an attachment disposed to be driven by the take-off shaft, certain parts being shown in elevation; and

Figure 3 is' a sectional view taken substantially on line 3--3 of Figure 2, certain parts being shown in elevation.

This application is a division of my copending application for Mixing machine, Serial No. 390,229, filed April 25, 1941.

The mixing machine with which the power take-off of my instant invention is intended to be used is disclosed in detail in my above identified copending application, and a brief description of that machine will suffice here. It comprises a suitable base (not shown) from which extends upward a tubular column having at its upper end a housing 22 the forward portion of which provides an overhang 23 projecting forward from the front vertical wall of the column, the latter and the head being formed of sheet metal of proper thickness welded together. A transmission unit 33 is mounted in overhang 23 of head 22, on a diaphragm plate 29 welded in overhang 23, Unit 33 comprises a shaft 31 .on which is secured a V-pulley 40 which receives a V-belt M passing about a V-pulley 32 secured on the shaft of a vertically disposed electric motor 44. Pulley 42 is of known type such that its effective radius is varied by adjustment of motor 44 toward and away from shaft 31, for varying the speed of the latter. The motor 44 is mounted on a carriage 5U slidably mounted on rods 55 and adjusted along the latter by means of a screw shaft 63 provided at its forward end with a hand wheel 'II' having a handle I2. A bowl support of approximately U- shape in'pl'an, comprising forwardly and out-. wardly curved arms 88, is slidably mounted on vertical rods on which it is adjusted by means of a screw shaft 95. This shaft is rotated in desired direction by means of a bevel gear 98 secured on the upper end thereof, meshing with a bevel gear 99 secured on a shaft I00 rotated by means of a hand wheel I03, secured on its outer end and provided with a handle I04. A mixing bowl I I6 is mounted on the bowl support, beneath overhang 23 of head 22, disposed for reception of a suitable implement driven from transmission '33 for mixing or agitating the contents of bowl IIB.

The transmission unit-33 is provided with a take-01f shaft I68 suitably driven by shaft 31.

Shaft E58 extends toward one side wall of overhang 23 of head 22, coaxially with a cylindrical housing I82 extending from the outer face of that wall and boltedthereto; Base l82a, of housing I82 is suitably bored and rabbeted for recep-' tion of a bearing retainer ring I83 confined between base I82a. and the wall of overhang 23. A ball bearing I 84, mounted in ring I83,rotatably supports a stepped sleeve I85 provided at its outer end with an integrally formed jaw clutch member I86 the inner or rearward face of which contacts the inner race of ball bearing I84. Sleeve I85 extends inwardly of overhang 23 and has a coupling member I 81 secured on its inner end, by means of a pin I88. Coupling member 181 is in engagement with a coupling member I8'Ia secured on the outer end of shaft I68, by a set screw [88s. The members I81 and I81a establish driving connection between shaft I53 and sleeve I85 while accommodating any slight misalignment of these parts which may be present due to the plate or sheet metal construction used.

Housing I82 is provided, at its outer end, with an inwardly extending collar I89 in which is seecured a bearing bushing I99 in which is mounted the outer end portion of a shaft I9! of stepped formation, the reduced inner portion I9Ia of which is rotatably mounted in bearing bushings I99a suitably secured in sleeve I85. The inner end of the body portion of shaft I9 I abuts the outer end of sleeve I85 and a collar I9Ib on shaft I9I, conveniently formed integrally therewith, abuts the inner end of collar I89, while the outer end of the hub of coupling member I81 abuts a shoulder on sleeve I 85. Shaft I 9! and sleeve I85 are thus confined against endwise movement relative to each other andto housing I82, and coupling member I81 i confined against endwise movement relative to sleeve I85.

A jaw clutch meir'iber I860, is splined on shaft I9 I, by ine'ans of a key I891), for movement lengthwise thereof into and out of engagement with clutch member 185. Member Iiiiia is provided with a circumferential groove I550 which receives studs I92b at the lower ends of arm 920, of a yoke l9 2 keyed on a rod I93 rotatably mounted in the upper portion of housing I82, Rod I93 is confined against endwisemovement by a stop collar 193a secured on one end thereof, and a shift lever I93b secured upon its other end. By

turning rod I93 in proper direction clutch mem- :i.

ber IB'Ed may be moved into and out of engagemerit with clutch member I 86, thus clutching and declutching shaft I9I to and from sleeve I85 as desired, It will be apparent that with the clutch member I8Ba in its position shown in Figure 2, shaft I Si is clutched to and driven by sleeve I85.

Thebore of clutch member I86 is of increased diameter at its inner portion, to provide clearance I860; about s'haft ISI, the latter being provided with adiam trical bore I9 Ic extending from the keyway therein, for key I866, the end of bore I9 I c remote from key I867) tapering outward and providing aii' opening of reduced diameter at that side of shaft I 9I. A locking ball I94 normally is held seated in the tapering end porti.

tion of bore I9I c, inpositi'on projecting a short distance outward beyondshaft I 9|, by a coil compression spring I95 disposed in bore I9Ic and confined between ball I94 and key IBfib. When clutch member I86a is in its position shown in Figure 2, ball I94 is in contact with the outer end of the hub of member IBM and holds the latter in'its engaged position, as shown. When member IBM is moved outward into its disen-' gaged position, ball I94 is disposed at the inner end of the hub thereof, within clearance I86d, and is effectivejor holding member IBM in its latter position, the parts being suitably proportionecl to that end, as will be understood. In the outer or declutched position of member IBBa, shaft I9I is declutche'd from slee ve I85 which may then rotate independently thereof,

At its outer end housing I82 is provided with a boss I96 having formed therein a depression I96a concentric with shaft Isl. y from the lower portion of housing I82 and is providedwith' a lengthwise bore I820. When takeoff shaft I68 is not being usedfor driving an attachment,'- the outer end 'of housing I82 is' closed by a cover plate 229 (Figures 1 and 2) seating A lug I821) depends upon boss I99 and suitably secured in position, conveniently by means of thumb screws 221 passing through plate 226 and screwing into boss I96. In Figure 2 I have indicated, in dotted lines, an attachment I91, such as a meat chopper, tool sharpener, fruit juice extractor, or other attach- Inent mounted in position to be driven from the take-off shaft I68. This attachment I91 is provided with a fiat element or base I91a which seats 1 against boss I96 and carries a rcarwardly extending projection I91?) which fits snugly within recess I9Ga. Base I91a is provided, at each side thereof, with a slot I98 of proper size to receive one of the screws 221, by means of which attachment is secured in position upon housing I82. A stud I99, suitably secured to attachment I91, fits into bore I820 of lug I821) and assists screws 221 in resisting any tendenct of the attachment to turn about the axis of shaft I9I. The latter is provided With a squared socket 290 in its outer end, which socket receives the correspondingly shaped terminal portion 21H of the shaft or driven member of the attachment I91. It will be seen that when attachment I91 is mounted upon housing I82 in the manner stated, it has driving connection to shaft I9I and may be driven therefrom or not at will, when take-01f shaft IE8 is driven, by appropriate manipulation of shift lever I932).

Diaphragm plate 29 is provided with an openmg 225 disposed beneath the coupling members I81 and I81a, and the side wall of overhang 23 is provided with an opening concentric with and of somewhat greater diameter than coupling member I81, as will be clear from Figures 1 and 2. By unbolting housing I32 from the wall of overhang 23, this housing and the parts mounted therein may be removed as a unit. The bearing retainer ring I 33, sleeve I85, shaft I 9| and associated parts may then be removed from hous ing I82 as a unit assembly, through the opening in base I82a, shift rod I93 being turned in counterclockwise direction during such removal until studs I921) clear the clutch member I 86a. The assembly unit is then accessible and readily may be disassembled for cleaning, repair or replacement of parts and as readily reassembled, after which it may be quickly and easily replaced within housing I82, by reversing the above operation, as will be obvious.

It will be understood that various changes in construction and arrangement of the parts of the power take-off of my invention may be resorted to without departing from the field and scope thereof, and I intend to include all such variations, as fall within the scope of the appended claims, in this application in which the preferred form only of my invention has been dis closed.

I claim:

1. In combination, a head and a transmission unit mounted therein having a take-off shaft extending therefrom toward a 'Wall of said head, said Wall having an opening therethrough, a housing removably mounted on the outer face of said wall over said opening, a driven shaft mounted in' said housing substantially coaxial with said take-off shaft, a sleeve extending about said driven shaft mounted for rotation therewith and relative thereto, means for clutching-and declutching said sleeve to and from said driven shaft, and means establishing driving connection between said take-off shaft and said sleeve disconnectible by endwise movement of said sleeve away from said take-off shaft.

2. In combination, a head and a transmission unit mounted therein having a take-01f shaft extending toward a wall of said head, said wall having an opening therethrough, a housing removably mounted on the outer face of said wall over said opening, a driven shaft mounted in said housing substantially coaxially with said take-off shaft, a sleeve extending about said driven shaft mounted for rotation therewith and relative thereto, said sleeve extending through said opening, means for clutching and declutching said sleeve to and from said driven shaft, a coupling member secured on the outer end of said take-off shaft, and a coupling member secured on the inner end of said sleeve in driving engagement with said take-off shaft coupling member, said sleeve coupling member being of a size to pass through said opening and engageable with and disengageable from said take-off coupling member by endwise movement of said sleeve toward and away from said take-off shaft.

3. In combination, a head and a transmission unit mounted therein having a take-off shaft extending toward a wall of said head, said wall having an opening therethrough, a housing removably mounted on the outer face of said wall over said opening, said housing having an opening at its inner end, a bearing retaining ring removably mounted in said opening of said housing retained between the latter and said wall,

bearing means mounted in said ring, a sleeve rotatably mounted in said bearing means restrained thereby against movement toward said take-off shaft, a driven shaft rotatably mounted in said housing and through said sleeve restrained against endwise movement away from said takeoff shaft, said driven shaft and said sleeve having cooperating means restraining said sleeve against endwise movement away from said takeoff shaft, said sleeve having a clutch member at its outer end, a clutch member splined on said driven shaft cooperating with said sleeve clutch member for clutching and declutching said sleeve to and from said driven shaft, said ring and driven shaft and the parts carried thereby being removable from and insertible into said housing as a unit through said opening at the inner end of said housing when the latter is removed from said head, a coupling member secured on the outer end of said take-oil shaft, and a coupling member secured on the inner end of said sleeve movable through said opening in said wall and engageable with and disengageable from said take-off shaft coupling member by endwise movement of said driven shaft toward and away from said take-off shaft.

4. In combination, a head and a transmission unit mounted therein having a take-off shaft extending toward a wall of said head, said wall having an opening therethrough, a housing removably mounted on the outer face of said wall over said opening, said housing having an opening at its inner end and a bearing collar at its outer end, a bearing retaining ring removably mounted in said opening of said housing retained between the latter and said wall, bearing means mounted in said ring, a sleeve rotatably mounted in said bearing means restrained thereby against movement toward said take-off shaft and having at its outer end a clutch member, a driven shaft rotatably mounted in said collar and through said sleeve having shoulders abutting the inner end of said collar and the outer end of said sleeve, a clutch member splined on said driven shaft cooperating with said sleeve clutch member for clutching and declutching said. sleeve to and from said driven shaft, said ring and driven shaft and the parts carried thereby being removable from and insertible into said housing as a unit through said opening at the inner end of said housing when the latter is removed from said head, a coupling member secured on the outer end of said take-off shaft, and a coupling member secured on the inner end of said sleeve movable through said opening in said wall and engageable with and disengageable from said take-off shaft coupling member by endwise movement of said driven shaft toward and away from said take-off shaft.

EDWARD J. KARP. 

